After discussing various scheduling formats for a new hypothetical summer collegiate league, I will post a list of current leagues. This list will include the
league name, number of teams, season length and the opening and closing dates of the regular season. This list is just and sampling of leagues, it is by no stretch a list of all summer leagues in North America.

All information is for the recently completed 2015 season.

League Teams Games Start & End Date
Alaska League 6 30 June 9 - August 2
Atlantic Coll. League 8 40 May 31 - August 2
Cal Ripken Coll. League 10 40 June 2 - July 24
California Coll. League 10 28 May 22 - August 2
Cape Cod League 10 44 June 9 - August 2
Coastal Plain League 15 56 May 26 - August 4
Florida Coll. League 6 40 June 4 - August 2
Futures League 10 56 June 4 - August 9
Great Lakes Coll. League 11 40 June 3 - July 28
Hamptons Coll. League 7 42 May 31 - July 25
Jayhawk League 8 36 June 4 - July 19
MINK League 8 40 May 29 - July 20
New England Coll. League 12 42 June 4 - August 1
New York Coll. League 13 46 May 30 - July 25
Northwoods League 18 72 May 26 - August 9
Pacific In't League 8 ? May 24 - July 29
Perfect Game League 10 50 June 2 - July 30
Prospect League 12 60 May 27 - August 6
Rocky Mountain League 12 36 May 29 - July 18
Southern Coll. League 6 42 June 1 - July 25
Sun Belt League 8(5) 28 June 1 - July 29
Texas Collegiate League 6 60 May 28 - August 7
Valley League 12 44 June 4 - July 26
West Coast League 12 54 June 5 - August 9
Western Major League 10 48 May 28 - August 1

The Sun Belt includes five “prostpect” teams that are not official league members.